" The terrible truth may be that civilization arose in and only because of an unusual warming period. If that is the truth, God help us, we are probably doomed in pretty short order (historically speaking). Meanwhile, warming has always been good for us and there is no reason to think that that will be different in the future. Individual persons and societies in general suffer much more from cold than from heat. If or when the global climate cycles back and the glaciers return, let us hope that human activity really can heat up the world "